考虑双向流固耦合的洪水作用下穿越河流管道力学行为分析  

Analysis on mechanical behavior of river-crossing pipeline under flood action considering two-way fluid-solid coupling

作　　者：刘玉龙[1] 伍颖[1] 李都 LIU Yulong;WU Ying;LI Du(School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu Sichuan 610500,China;Sichuan China Resources Wantong Gas Co.,LTD.,Suining Sichuan 629000,China)

机构地区：[1]西南石油大学土木工程与测绘学院,四川成都610500 [2]四川华润万通燃气股份有限公司,四川遂宁629000

出　　处：《中国安全生产科学技术》2024年第11期77-84,共8页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(52304258);四川省科技计划项目(2020YJ0153)。

摘　　要：为了解决洪水作用下穿越河流管道单向流固耦合未考虑管道对洪水影响而导致结果不准确的问题,提出洪水-管道双向流固耦合有限元计算模型,基于该模型开展不同因素下管道应力、位移和振动频率的力学行为分析。研究结果表明:管道应力、位移与洪水流速、悬空长度呈强正相关,管道存在屈服破坏和变形破坏的风险,且输油管道尤其明显;管道涡激振动频率与洪水流速、悬空长度呈强相关,这2个因素增大导致管道共振风险增大,且输气管道尤其明显;涡激振动引起的交变荷载导致管道累计损伤,管道存在疲劳破坏的风险。因此,管道设计时应采取预防性措施以应对洪水灾害,特别关注洪水流速、悬空长度和输送介质的影响,以避免管道发生破坏。研究结果对穿越河流管道的安全评价及可靠性研究具有参考价值。In order to solve the problem that the one-way fluid-solid coupling of the river-crossing pipeline under the action of flood does not consider the influence of pipeline on the flood,resulting in inaccurate results.A two-way fluid-solid coupling finite element calculation model of flood-pipeline was proposed.Based on this model,the mechanical behavior of pipeline stress,displacement and vibration frequency under different factors was analyzed.The results show that the pipeline stress and displacement are strongly positively correlated with the flood velocity and the suspended length,and the pipeline has the risk of yield failure and deformation failure,especially for the oil pipeline.The vortex-induced vibration frequency of the pipeline is strongly correlated with the flood velocity and the suspended length,and the increase of these two factors leads to the increase of the resonance risk of pipeline,especially for the gas pipeline.The alternating load caused by vortex-induced vibration leads to the cumulative damage of pipeline,and the pipeline has the risk of fatigue failure.Therefore,the preventive measures should be taken to deal with flood disasters in pipeline design,with special attention to the influence of flood velocity,suspended length and conveying medium,so as to avoid the pipeline damage.The research results have reference value for the safety evaluation and reliability research of river-crossing pipelines.

关 键 词：穿越河流管道 洪水 双向流固耦合 力学行为分析 涡激振动 

分 类 号：X937[环境科学与工程—安全科学]